Thank you SuzeeQ for your reply.
I also thought that just doing half the stitches for front and half back woul work but it didn't,
I finally figured it out. It takes only 70 stitches out of the 248 to measure 14" which is half of the total 28" around the body.

The attachment management of this web is not working well. I keep on getting bumped. I'll try again tomorrow.